Allergic reaction can occur to strong soaps, Solvents, chemicals, certain foods, food additives, plants, metals, cosmetics, even urine and faeces of some animals (dust mites).
Scabies is an infestation by the itch mite. Scabies produces small
and blisters and affects specific areas of the body. Scabies may involve the webs between the fingers, the wrists or other folds of body. Rash in scabies is usually found in the folds of skin and they are red blister like rashes.